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Expansion Vessel - Baxi - Main - Potterton Top Up

View the thread, titled "Expansion Vessel - Baxi - Main - Potterton Top Up" which is posted in Boiler Advice Forum on UK Plumbers Forums.

Hey folks,

So I have a Potterton, and after the water pump has gone on it I changed it and when I was looking on Youtube I noticed a video about the expansion vessel, started watching it and he mentioned that if the pressure gauage after a while starts hitting three then it's more than likely the pressure vessel, so I bought a foot pump today and fitted it to the valve and there wasn't any pressure reading on the gauge on the foot pump, so I pumped it up to 1 bar, thing is the valve is on the top of the expansion vessel and getting it off quickly is a bit of a mare and the air just escapes.

So I'd been looking at a Baxi Boiler Expansion Vessel Repair Kit, but surely the air is just going to escape when this is unscrewed from the Schrader valve on the boiler?

The guy in the video says just to unscrew it quickly but it's going to leak empty quite quickly like the foot pump does, how ever it's a bad design and the Schrader valve is on the top so you can't quickly release the foot pump.

Do you jut leave the extension connected? this would allow me to remove the foot pump connection once filled quite quickly

Any tips welcome.

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